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David S. Millera2fb23a2007-02-28 23:35:04 -08001/* pci.c: UltraSparc PCI controller support.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
3 * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
David S. Millera2fb23a2007-02-28 23:35:04 -08006 *
7 * OF tree based PCI bus probing taken from the PowerPC port
8 * with minor modifications, see there for credits.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 */
10
Paul Gortmaker066bcac2011-07-22 13:18:16 -040011#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/kernel.h>
13#include <linux/string.h>
14#include <linux/sched.h>
15#include <linux/capability.h>
16#include <linux/errno.h>
David S. Millerc57c2ff2007-05-08 00:43:56 -070017#include <linux/pci.h>
David S. Miller35a17eb2007-02-10 17:41:02 -080018#include <linux/msi.h>
19#include <linux/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/init.h>
David S. Miller356d1642008-08-30 00:36:11 -070021#include <linux/of.h>
22#include <linux/of_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/pgtable.h>
26#include <asm/irq.h>
David S. Millere87dc352006-06-21 18:18:47 -070027#include <asm/prom.h>
David S. Miller01f94c42007-03-04 12:53:19 -080028#include <asm/apb.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
David S. Miller1e8a8cc2007-02-28 23:38:38 -080030#include "pci_impl.h"
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032/* List of all PCI controllers found in the system. */
David S. Miller34768bc2007-05-07 23:06:27 -070033struct pci_pbm_info *pci_pbm_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
David S. Miller6c108f12007-05-07 23:49:01 -070035/* Each PBM found gets a unique index. */
36int pci_num_pbms = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Linus Torvalds1da177e2005-04-16 15:20:36 -070038volatile int pci_poke_in_progress;
39volatile int pci_poke_cpu = -1;
40volatile int pci_poke_faulted;
41
42static DEFINE_SPINLOCK(pci_poke_lock);
43
44void pci_config_read8(u8 *addr, u8 *ret)
45{
46 unsigned long flags;
47 u8 byte;
48
49 spin_lock_irqsave(&pci_poke_lock, flags);
50 pci_poke_cpu = smp_processor_id();
51 pci_poke_in_progress = 1;
52 pci_poke_faulted = 0;
53 __asm__ __volatile__("membar #Sync\n\t"
54 "lduba [%1] %2, %0\n\t"
55 "membar #Sync"
56 : "=r" (byte)
57 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
58 : "memory");
59 pci_poke_in_progress = 0;
60 pci_poke_cpu = -1;
61 if (!pci_poke_faulted)
62 *ret = byte;
63 spin_unlock_irqrestore(&pci_poke_lock, flags);
64}
65
66void pci_config_read16(u16 *addr, u16 *ret)
67{
68 unsigned long flags;
69 u16 word;
70
71 spin_lock_irqsave(&pci_poke_lock, flags);
72 pci_poke_cpu = smp_processor_id();
73 pci_poke_in_progress = 1;
74 pci_poke_faulted = 0;
75 __asm__ __volatile__("membar #Sync\n\t"
76 "lduha [%1] %2, %0\n\t"
77 "membar #Sync"
78 : "=r" (word)
79 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
80 : "memory");
81 pci_poke_in_progress = 0;
82 pci_poke_cpu = -1;
83 if (!pci_poke_faulted)
84 *ret = word;
85 spin_unlock_irqrestore(&pci_poke_lock, flags);
86}
87
88void pci_config_read32(u32 *addr, u32 *ret)
89{
90 unsigned long flags;
91 u32 dword;
92
93 spin_lock_irqsave(&pci_poke_lock, flags);
94 pci_poke_cpu = smp_processor_id();
95 pci_poke_in_progress = 1;
96 pci_poke_faulted = 0;
97 __asm__ __volatile__("membar #Sync\n\t"
98 "lduwa [%1] %2, %0\n\t"
99 "membar #Sync"
100 : "=r" (dword)
101 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
102 : "memory");
103 pci_poke_in_progress = 0;
104 pci_poke_cpu = -1;
105 if (!pci_poke_faulted)
106 *ret = dword;
107 spin_unlock_irqrestore(&pci_poke_lock, flags);
108}
109
110void pci_config_write8(u8 *addr, u8 val)
111{
112 unsigned long flags;
113
114 spin_lock_irqsave(&pci_poke_lock, flags);
115 pci_poke_cpu = smp_processor_id();
116 pci_poke_in_progress = 1;
117 pci_poke_faulted = 0;
118 __asm__ __volatile__("membar #Sync\n\t"
119 "stba %0, [%1] %2\n\t"
120 "membar #Sync"
121 : /* no outputs */
122 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
123 : "memory");
124 pci_poke_in_progress = 0;
125 pci_poke_cpu = -1;
126 spin_unlock_irqrestore(&pci_poke_lock, flags);
127}
128
129void pci_config_write16(u16 *addr, u16 val)
130{
131 unsigned long flags;
132
133 spin_lock_irqsave(&pci_poke_lock, flags);
134 pci_poke_cpu = smp_processor_id();
135 pci_poke_in_progress = 1;
136 pci_poke_faulted = 0;
137 __asm__ __volatile__("membar #Sync\n\t"
138 "stha %0, [%1] %2\n\t"
139 "membar #Sync"
140 : /* no outputs */
141 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
142 : "memory");
143 pci_poke_in_progress = 0;
144 pci_poke_cpu = -1;
145 spin_unlock_irqrestore(&pci_poke_lock, flags);
146}
147
148void pci_config_write32(u32 *addr, u32 val)
149{
150 unsigned long flags;
151
152 spin_lock_irqsave(&pci_poke_lock, flags);
153 pci_poke_cpu = smp_processor_id();
154 pci_poke_in_progress = 1;
155 pci_poke_faulted = 0;
156 __asm__ __volatile__("membar #Sync\n\t"
157 "stwa %0, [%1] %2\n\t"
158 "membar #Sync"
159 : /* no outputs */
160 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
161 : "memory");
162 pci_poke_in_progress = 0;
163 pci_poke_cpu = -1;
164 spin_unlock_irqrestore(&pci_poke_lock, flags);
165}
166
David S. Miller5840fc62007-05-22 01:24:14 -0700167static int ofpci_verbose;
168
169static int __init ofpci_debug(char *str)
170{
171 int val = 0;
172
173 get_option(&str, &val);
174 if (val)
175 ofpci_verbose = 1;
176 return 1;
177}
178
179__setup("ofpci_debug=", ofpci_debug);
180
David S. Millera2fb23a2007-02-28 23:35:04 -0800181static unsigned long pci_parse_of_flags(u32 addr0)
182{
183 unsigned long flags = 0;
184
185 if (addr0 & 0x02000000) {
186 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
187 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
188 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
189 if (addr0 & 0x40000000)
190 flags |= IORESOURCE_PREFETCH
191 | PCI_BASE_ADDRESS_MEM_PREFETCH;
192 } else if (addr0 & 0x01000000)
193 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
194 return flags;
195}
196
197/* The of_device layer has translated all of the assigned-address properties
198 * into physical address resources, we only have to figure out the register
199 * mapping.
200 */
Grant Likelycd4cd732010-07-22 16:04:30 -0600201static void pci_parse_of_addrs(struct platform_device *op,
David S. Millera2fb23a2007-02-28 23:35:04 -0800202 struct device_node *node,
203 struct pci_dev *dev)
204{
205 struct resource *op_res;
206 const u32 *addrs;
207 int proplen;
208
209 addrs = of_get_property(node, "assigned-addresses", &proplen);
210 if (!addrs)
211 return;
David S. Miller5840fc62007-05-22 01:24:14 -0700212 if (ofpci_verbose)
213 printk(" parse addresses (%d bytes) @ %p\n",
214 proplen, addrs);
David S. Millera2fb23a2007-02-28 23:35:04 -0800215 op_res = &op->resource[0];
216 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
217 struct resource *res;
218 unsigned long flags;
219 int i;
220
221 flags = pci_parse_of_flags(addrs[0]);
222 if (!flags)
223 continue;
224 i = addrs[0] & 0xff;
David S. Miller5840fc62007-05-22 01:24:14 -0700225 if (ofpci_verbose)
Sam Ravnborg90181132009-01-06 13:19:28 -0800226 printk(" start: %llx, end: %llx, i: %x\n",
David S. Miller5840fc62007-05-22 01:24:14 -0700227 op_res->start, op_res->end, i);
David S. Millera2fb23a2007-02-28 23:35:04 -0800228
229 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
230 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
231 } else if (i == dev->rom_base_reg) {
232 res = &dev->resource[PCI_ROM_RESOURCE];
Kjetil Oftedalaad45642011-10-19 16:20:50 -0700233 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE
234 | IORESOURCE_SIZEALIGN;
David S. Millera2fb23a2007-02-28 23:35:04 -0800235 } else {
236 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
237 continue;
238 }
239 res->start = op_res->start;
240 res->end = op_res->end;
241 res->flags = flags;
242 res->name = pci_name(dev);
243 }
244}
245
David S. Miller77d10d02008-09-11 23:57:40 -0700246static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
247 struct device_node *node,
248 struct pci_bus *bus, int devfn)
David S. Millera2fb23a2007-02-28 23:35:04 -0800249{
250 struct dev_archdata *sd;
David S. Miller172d2d02010-02-17 16:42:08 -0800251 struct pci_slot *slot;
Grant Likelycd4cd732010-07-22 16:04:30 -0600252 struct platform_device *op;
David S. Millera2fb23a2007-02-28 23:35:04 -0800253 struct pci_dev *dev;
254 const char *type;
David S. Miller01f94c42007-03-04 12:53:19 -0800255 u32 class;
David S. Millera2fb23a2007-02-28 23:35:04 -0800256
Gu Zheng8b1fce02013-05-25 21:48:31 +0800257 dev = pci_alloc_dev(bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800258 if (!dev)
259 return NULL;
260
261 sd = &dev->dev.archdata;
262 sd->iommu = pbm->iommu;
263 sd->stc = &pbm->stc;
264 sd->host_controller = pbm;
David S. Millerae05f872008-08-29 22:42:34 -0700265 sd->op = op = of_find_device_by_node(node);
David S. Millerc1b1a5f2008-03-19 04:52:48 -0700266 sd->numa_node = pbm->numa_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800267
David S. Millerae05f872008-08-29 22:42:34 -0700268 sd = &op->dev.archdata;
David S. Millerad7ad572007-07-27 22:39:14 -0700269 sd->iommu = pbm->iommu;
270 sd->stc = &pbm->stc;
David S. Millerc1b1a5f2008-03-19 04:52:48 -0700271 sd->numa_node = pbm->numa_node;
David S. Millerad7ad572007-07-27 22:39:14 -0700272
David S. Millerae05f872008-08-29 22:42:34 -0700273 if (!strcmp(node->name, "ebus"))
274 of_propagate_archdata(op);
275
David S. Millera2fb23a2007-02-28 23:35:04 -0800276 type = of_get_property(node, "device_type", NULL);
277 if (type == NULL)
278 type = "";
279
David S. Miller5840fc62007-05-22 01:24:14 -0700280 if (ofpci_verbose)
281 printk(" create device, devfn: %x, type: %s\n",
282 devfn, type);
David S. Millera2fb23a2007-02-28 23:35:04 -0800283
David S. Millera2fb23a2007-02-28 23:35:04 -0800284 dev->sysdata = node;
285 dev->dev.parent = bus->bridge;
286 dev->dev.bus = &pci_bus_type;
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +1000287 dev->dev.of_node = of_node_get(node);
David S. Millera2fb23a2007-02-28 23:35:04 -0800288 dev->devfn = devfn;
289 dev->multifunction = 0; /* maybe a lie? */
David S. Miller172d2d02010-02-17 16:42:08 -0800290 set_pcie_port_type(dev);
291
292 list_for_each_entry(slot, &dev->bus->slots, list)
293 if (PCI_SLOT(dev->devfn) == slot->number)
294 dev->slot = slot;
David S. Millera2fb23a2007-02-28 23:35:04 -0800295
David S. Millerc26d3c02008-05-01 01:12:40 -0700296 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
297 dev->device = of_getintprop_default(node, "device-id", 0xffff);
298 dev->subsystem_vendor =
299 of_getintprop_default(node, "subsystem-vendor-id", 0);
300 dev->subsystem_device =
301 of_getintprop_default(node, "subsystem-id", 0);
David S. Millera2fb23a2007-02-28 23:35:04 -0800302
David S. Millerc26d3c02008-05-01 01:12:40 -0700303 dev->cfg_size = pci_cfg_space_size(dev);
David S. Miller01f94c42007-03-04 12:53:19 -0800304
David S. Millerc26d3c02008-05-01 01:12:40 -0700305 /* We can't actually use the firmware value, we have
306 * to read what is in the register right now. One
307 * reason is that in the case of IDE interfaces the
308 * firmware can sample the value before the the IDE
309 * interface is programmed into native mode.
310 */
311 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
312 dev->class = class >> 8;
313 dev->revision = class & 0xff;
David S. Miller28f57e72007-03-12 19:40:26 -0700314
Greg Kroah-Hartman2222c312008-05-02 06:02:41 +0200315 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
David S. Millerc26d3c02008-05-01 01:12:40 -0700316 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
317
David S. Miller5840fc62007-05-22 01:24:14 -0700318 if (ofpci_verbose)
319 printk(" class: 0x%x device name: %s\n",
320 dev->class, pci_name(dev));
David S. Millera2fb23a2007-02-28 23:35:04 -0800321
David S. Miller861fe902007-05-02 17:31:36 -0700322 /* I have seen IDE devices which will not respond to
323 * the bmdma simplex check reads if bus mastering is
324 * disabled.
325 */
326 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
327 pci_set_master(dev);
328
Bjorn Helgaasde7f2b12013-05-20 17:15:20 -0600329 dev->current_state = PCI_UNKNOWN; /* unknown power state */
David S. Millera2fb23a2007-02-28 23:35:04 -0800330 dev->error_state = pci_channel_io_normal;
David S. Miller172d2d02010-02-17 16:42:08 -0800331 dev->dma_mask = 0xffffffff;
David S. Millera2fb23a2007-02-28 23:35:04 -0800332
David S. Miller44b50e52008-09-22 15:42:24 -0700333 if (!strcmp(node->name, "pci")) {
David S. Millerc26d3c02008-05-01 01:12:40 -0700334 /* a PCI-PCI bridge */
David S. Millera2fb23a2007-02-28 23:35:04 -0800335 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
336 dev->rom_base_reg = PCI_ROM_ADDRESS1;
David S. Millerc26d3c02008-05-01 01:12:40 -0700337 } else if (!strcmp(type, "cardbus")) {
338 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
David S. Millera2fb23a2007-02-28 23:35:04 -0800339 } else {
David S. Millerc26d3c02008-05-01 01:12:40 -0700340 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
341 dev->rom_base_reg = PCI_ROM_ADDRESS;
David S. Millera2fb23a2007-02-28 23:35:04 -0800342
Grant Likely1636f8a2010-06-18 11:09:58 -0600343 dev->irq = sd->op->archdata.irqs[0];
David S. Millerc26d3c02008-05-01 01:12:40 -0700344 if (dev->irq == 0xffffffff)
345 dev->irq = PCI_IRQ_NONE;
David S. Millera2fb23a2007-02-28 23:35:04 -0800346 }
David S. Millerc26d3c02008-05-01 01:12:40 -0700347
David S. Millera2fb23a2007-02-28 23:35:04 -0800348 pci_parse_of_addrs(sd->op, node, dev);
349
David S. Miller5840fc62007-05-22 01:24:14 -0700350 if (ofpci_verbose)
351 printk(" adding to system ...\n");
David S. Millera2fb23a2007-02-28 23:35:04 -0800352
353 pci_device_add(dev, bus);
354
355 return dev;
356}
357
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100358static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
David S. Miller01f94c42007-03-04 12:53:19 -0800359{
360 u32 idx, first, last;
361
362 first = 8;
363 last = 0;
364 for (idx = 0; idx < 8; idx++) {
365 if ((map & (1 << idx)) != 0) {
366 if (first > idx)
367 first = idx;
368 if (last < idx)
369 last = idx;
370 }
371 }
372
373 *first_p = first;
374 *last_p = last;
375}
376
377/* Cook up fake bus resources for SUNW,simba PCI bridges which lack
378 * a proper 'ranges' property.
379 */
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100380static void apb_fake_ranges(struct pci_dev *dev,
381 struct pci_bus *bus,
382 struct pci_pbm_info *pbm)
David S. Miller01f94c42007-03-04 12:53:19 -0800383{
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600384 struct pci_bus_region region;
David S. Miller01f94c42007-03-04 12:53:19 -0800385 struct resource *res;
386 u32 first, last;
387 u8 map;
388
389 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
390 apb_calc_first_last(map, &first, &last);
391 res = bus->resource[0];
David S. Miller01f94c42007-03-04 12:53:19 -0800392 res->flags = IORESOURCE_IO;
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600393 region.start = (first << 21);
394 region.end = (last << 21) + ((1 << 21) - 1);
Yinghai Lufc279852013-12-09 22:54:40 -0800395 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Miller01f94c42007-03-04 12:53:19 -0800396
397 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
398 apb_calc_first_last(map, &first, &last);
399 res = bus->resource[1];
David S. Miller01f94c42007-03-04 12:53:19 -0800400 res->flags = IORESOURCE_MEM;
oftedal557fc582013-10-18 22:28:29 +0200401 region.start = (first << 29);
402 region.end = (last << 29) + ((1 << 29) - 1);
Yinghai Lufc279852013-12-09 22:54:40 -0800403 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Miller01f94c42007-03-04 12:53:19 -0800404}
405
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100406static void pci_of_scan_bus(struct pci_pbm_info *pbm,
407 struct device_node *node,
408 struct pci_bus *bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800409
410#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
411
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100412static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
413 struct device_node *node,
414 struct pci_dev *dev)
David S. Millera2fb23a2007-02-28 23:35:04 -0800415{
416 struct pci_bus *bus;
417 const u32 *busrange, *ranges;
David S. Miller01f94c42007-03-04 12:53:19 -0800418 int len, i, simba;
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600419 struct pci_bus_region region;
David S. Millera2fb23a2007-02-28 23:35:04 -0800420 struct resource *res;
421 unsigned int flags;
422 u64 size;
423
David S. Miller5840fc62007-05-22 01:24:14 -0700424 if (ofpci_verbose)
425 printk("of_scan_pci_bridge(%s)\n", node->full_name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800426
427 /* parse bus-range property */
428 busrange = of_get_property(node, "bus-range", &len);
429 if (busrange == NULL || len != 8) {
430 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
431 node->full_name);
432 return;
433 }
434 ranges = of_get_property(node, "ranges", &len);
David S. Miller01f94c42007-03-04 12:53:19 -0800435 simba = 0;
David S. Millera2fb23a2007-02-28 23:35:04 -0800436 if (ranges == NULL) {
David S. Millera165b422007-03-29 01:50:16 -0700437 const char *model = of_get_property(node, "model", NULL);
David S. Miller8c2786c2007-06-07 21:59:44 -0700438 if (model && !strcmp(model, "SUNW,simba"))
David S. Miller01f94c42007-03-04 12:53:19 -0800439 simba = 1;
David S. Millera2fb23a2007-02-28 23:35:04 -0800440 }
441
442 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
443 if (!bus) {
444 printk(KERN_ERR "Failed to create pci bus for %s\n",
445 node->full_name);
446 return;
447 }
448
449 bus->primary = dev->bus->number;
Yinghai Lu3f1b5402012-05-17 18:51:12 -0700450 pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
David S. Millera2fb23a2007-02-28 23:35:04 -0800451 bus->bridge_ctl = 0;
452
David S. Miller01f94c42007-03-04 12:53:19 -0800453 /* parse ranges property, or cook one up by hand for Simba */
David S. Millera2fb23a2007-02-28 23:35:04 -0800454 /* PCI #address-cells == 3 and #size-cells == 2 always */
455 res = &dev->resource[PCI_BRIDGE_RESOURCES];
456 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
457 res->flags = 0;
458 bus->resource[i] = res;
459 ++res;
460 }
David S. Miller01f94c42007-03-04 12:53:19 -0800461 if (simba) {
462 apb_fake_ranges(dev, bus, pbm);
David S. Miller8c2786c2007-06-07 21:59:44 -0700463 goto after_ranges;
464 } else if (ranges == NULL) {
Bjorn Helgaas1c975932012-07-09 13:39:52 -0600465 pci_read_bridge_bases(bus);
David S. Miller8c2786c2007-06-07 21:59:44 -0700466 goto after_ranges;
David S. Miller01f94c42007-03-04 12:53:19 -0800467 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800468 i = 1;
469 for (; len >= 32; len -= 32, ranges += 8) {
David S. Millera2fb23a2007-02-28 23:35:04 -0800470 flags = pci_parse_of_flags(ranges[0]);
471 size = GET_64BIT(ranges, 6);
472 if (flags == 0 || size == 0)
473 continue;
474 if (flags & IORESOURCE_IO) {
475 res = bus->resource[0];
476 if (res->flags) {
477 printk(KERN_ERR "PCI: ignoring extra I/O range"
478 " for bridge %s\n", node->full_name);
479 continue;
480 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800481 } else {
482 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
483 printk(KERN_ERR "PCI: too many memory ranges"
484 " for bridge %s\n", node->full_name);
485 continue;
486 }
487 res = bus->resource[i];
488 ++i;
David S. Millera2fb23a2007-02-28 23:35:04 -0800489 }
490
David S. Millera2fb23a2007-02-28 23:35:04 -0800491 res->flags = flags;
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600492 region.start = GET_64BIT(ranges, 1);
493 region.end = region.start + size - 1;
Yinghai Lufc279852013-12-09 22:54:40 -0800494 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Millera2fb23a2007-02-28 23:35:04 -0800495 }
David S. Miller8c2786c2007-06-07 21:59:44 -0700496after_ranges:
David S. Millera2fb23a2007-02-28 23:35:04 -0800497 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
498 bus->number);
David S. Miller5840fc62007-05-22 01:24:14 -0700499 if (ofpci_verbose)
500 printk(" bus name: %s\n", bus->name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800501
502 pci_of_scan_bus(pbm, node, bus);
503}
504
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100505static void pci_of_scan_bus(struct pci_pbm_info *pbm,
506 struct device_node *node,
507 struct pci_bus *bus)
David S. Millera2fb23a2007-02-28 23:35:04 -0800508{
509 struct device_node *child;
510 const u32 *reg;
David S. Miller2cc73452007-09-12 10:15:59 +0200511 int reglen, devfn, prev_devfn;
David S. Millera2fb23a2007-02-28 23:35:04 -0800512 struct pci_dev *dev;
513
David S. Miller5840fc62007-05-22 01:24:14 -0700514 if (ofpci_verbose)
515 printk("PCI: scan_bus[%s] bus no %d\n",
516 node->full_name, bus->number);
David S. Millera2fb23a2007-02-28 23:35:04 -0800517
518 child = NULL;
David S. Miller2cc73452007-09-12 10:15:59 +0200519 prev_devfn = -1;
David S. Millera2fb23a2007-02-28 23:35:04 -0800520 while ((child = of_get_next_child(node, child)) != NULL) {
David S. Miller5840fc62007-05-22 01:24:14 -0700521 if (ofpci_verbose)
522 printk(" * %s\n", child->full_name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800523 reg = of_get_property(child, "reg", &reglen);
524 if (reg == NULL || reglen < 20)
525 continue;
David S. Miller2cc73452007-09-12 10:15:59 +0200526
David S. Millera2fb23a2007-02-28 23:35:04 -0800527 devfn = (reg[0] >> 8) & 0xff;
528
David S. Miller2cc73452007-09-12 10:15:59 +0200529 /* This is a workaround for some device trees
530 * which list PCI devices twice. On the V100
531 * for example, device number 3 is listed twice.
532 * Once as "pm" and once again as "lomp".
533 */
534 if (devfn == prev_devfn)
535 continue;
536 prev_devfn = devfn;
537
David S. Millera2fb23a2007-02-28 23:35:04 -0800538 /* create a new pci_dev for this device */
David S. Millerc26d3c02008-05-01 01:12:40 -0700539 dev = of_create_pci_dev(pbm, child, bus, devfn);
David S. Millera2fb23a2007-02-28 23:35:04 -0800540 if (!dev)
541 continue;
David S. Miller5840fc62007-05-22 01:24:14 -0700542 if (ofpci_verbose)
543 printk("PCI: dev header type: %x\n",
544 dev->hdr_type);
David S. Millera2fb23a2007-02-28 23:35:04 -0800545
Yijing Wang2f22e682014-05-04 12:23:42 +0800546 if (pci_is_bridge(dev))
David S. Millera2fb23a2007-02-28 23:35:04 -0800547 of_scan_pci_bridge(pbm, child, dev);
548 }
549}
550
551static ssize_t
552show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
553{
554 struct pci_dev *pdev;
555 struct device_node *dp;
556
557 pdev = to_pci_dev(dev);
Grant Likely61c7a082010-04-13 16:12:29 -0700558 dp = pdev->dev.of_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800559
560 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
561}
562
563static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
564
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100565static void pci_bus_register_of_sysfs(struct pci_bus *bus)
David S. Millera2fb23a2007-02-28 23:35:04 -0800566{
567 struct pci_dev *dev;
David S. Millera378fd02007-03-01 11:46:13 -0800568 struct pci_bus *child_bus;
David S. Millera2fb23a2007-02-28 23:35:04 -0800569 int err;
570
571 list_for_each_entry(dev, &bus->devices, bus_list) {
572 /* we don't really care if we can create this file or
573 * not, but we need to assign the result of the call
574 * or the world will fall under alien invasion and
575 * everybody will be frozen on a spaceship ready to be
576 * eaten on alpha centauri by some green and jelly
577 * humanoid.
578 */
579 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
David S. Millerc6fee082011-02-26 23:40:02 -0800580 (void) err;
David S. Millera2fb23a2007-02-28 23:35:04 -0800581 }
David S. Millera378fd02007-03-01 11:46:13 -0800582 list_for_each_entry(child_bus, &bus->children, node)
583 pci_bus_register_of_sysfs(child_bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800584}
585
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100586struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
587 struct device *parent)
David S. Millera2fb23a2007-02-28 23:35:04 -0800588{
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600589 LIST_HEAD(resources);
Grant Likely61c7a082010-04-13 16:12:29 -0700590 struct device_node *node = pbm->op->dev.of_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800591 struct pci_bus *bus;
592
593 printk("PCI: Scanning PBM %s\n", node->full_name);
594
Bjorn Helgaasac1edcc2012-02-23 20:19:04 -0700595 pci_add_resource_offset(&resources, &pbm->io_space,
596 pbm->io_space.start);
597 pci_add_resource_offset(&resources, &pbm->mem_space,
598 pbm->mem_space.start);
Yinghai Lu3f1b5402012-05-17 18:51:12 -0700599 pbm->busn.start = pbm->pci_first_busno;
600 pbm->busn.end = pbm->pci_last_busno;
601 pbm->busn.flags = IORESOURCE_BUS;
602 pci_add_resource(&resources, &pbm->busn);
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600603 bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
604 pbm, &resources);
David S. Millera2fb23a2007-02-28 23:35:04 -0800605 if (!bus) {
606 printk(KERN_ERR "Failed to create bus for %s\n",
607 node->full_name);
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600608 pci_free_resource_list(&resources);
David S. Millera2fb23a2007-02-28 23:35:04 -0800609 return NULL;
610 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800611
David S. Millera2fb23a2007-02-28 23:35:04 -0800612 pci_of_scan_bus(pbm, node, bus);
613 pci_bus_add_devices(bus);
614 pci_bus_register_of_sysfs(bus);
615
616 return bus;
617}
618
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100619void pcibios_fixup_bus(struct pci_bus *pbus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
622
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100623resource_size_t pcibios_align_resource(void *data, const struct resource *res,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100624 resource_size_t size, resource_size_t align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625{
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100626 return res->start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}
628
David S. Millera2fb23a2007-02-28 23:35:04 -0800629int pcibios_enable_device(struct pci_dev *dev, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
David S. Millera2fb23a2007-02-28 23:35:04 -0800631 u16 cmd, oldcmd;
632 int i;
633
634 pci_read_config_word(dev, PCI_COMMAND, &cmd);
635 oldcmd = cmd;
636
637 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
638 struct resource *res = &dev->resource[i];
639
640 /* Only set up the requested stuff */
641 if (!(mask & (1<<i)))
642 continue;
643
644 if (res->flags & IORESOURCE_IO)
645 cmd |= PCI_COMMAND_IO;
646 if (res->flags & IORESOURCE_MEM)
647 cmd |= PCI_COMMAND_MEMORY;
648 }
649
650 if (cmd != oldcmd) {
651 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
652 pci_name(dev), cmd);
653 /* Enable the appropriate bits in the PCI command register. */
654 pci_write_config_word(dev, PCI_COMMAND, cmd);
655 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 return 0;
657}
658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659/* Platform support for /proc/bus/pci/X/Y mmap()s. */
660
661/* If the user uses a host-bridge as the PCI device, he may use
662 * this to perform a raw mmap() of the I/O or MEM space behind
663 * that controller.
664 *
665 * This can be useful for execution of x86 PCI bios initialization code
666 * on a PCI card, like the xfree86 int10 stuff does.
667 */
668static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
669 enum pci_mmap_state mmap_state)
670{
David S. Millera2fb23a2007-02-28 23:35:04 -0800671 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 unsigned long space_size, user_offset, user_size;
673
David S. Miller3875c5c2007-03-08 22:52:11 -0800674 if (mmap_state == pci_mmap_io) {
Joe Perches28f65c112011-06-09 09:13:32 -0700675 space_size = resource_size(&pbm->io_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 } else {
Joe Perches28f65c112011-06-09 09:13:32 -0700677 space_size = resource_size(&pbm->mem_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 }
679
680 /* Make sure the request is in range. */
681 user_offset = vma->vm_pgoff << PAGE_SHIFT;
682 user_size = vma->vm_end - vma->vm_start;
683
684 if (user_offset >= space_size ||
685 (user_offset + user_size) > space_size)
686 return -EINVAL;
687
David S. Miller3875c5c2007-03-08 22:52:11 -0800688 if (mmap_state == pci_mmap_io) {
689 vma->vm_pgoff = (pbm->io_space.start +
690 user_offset) >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 } else {
David S. Miller3875c5c2007-03-08 22:52:11 -0800692 vma->vm_pgoff = (pbm->mem_space.start +
693 user_offset) >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 }
695
696 return 0;
697}
698
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700699/* Adjust vm_pgoff of VMA such that it is the physical page offset
700 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 *
702 * Basically, the user finds the base address for his device which he wishes
703 * to mmap. They read the 32-bit value from the config space base register,
704 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
705 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
706 *
707 * Returns negative error code on failure, zero on success.
708 */
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700709static int __pci_mmap_make_offset(struct pci_dev *pdev,
710 struct vm_area_struct *vma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 enum pci_mmap_state mmap_state)
712{
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700713 unsigned long user_paddr, user_size;
714 int i, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700716 /* First compute the physical address in vma->vm_pgoff,
717 * making sure the user offset is within range in the
718 * appropriate PCI space.
719 */
720 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
721 if (err)
722 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700724 /* If this is a mapping on a host bridge, any address
725 * is OK.
726 */
727 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
728 return err;
729
730 /* Otherwise make sure it's in the range for one of the
731 * device's resources.
732 */
733 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
734 user_size = vma->vm_end - vma->vm_start;
735
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700737 struct resource *rp = &pdev->resource[i];
Max Dmitrichenko57699072008-11-02 00:34:10 -0700738 resource_size_t aligned_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740 /* Active? */
741 if (!rp->flags)
742 continue;
743
744 /* Same type? */
745 if (i == PCI_ROM_RESOURCE) {
746 if (mmap_state != pci_mmap_mem)
747 continue;
748 } else {
749 if ((mmap_state == pci_mmap_io &&
750 (rp->flags & IORESOURCE_IO) == 0) ||
751 (mmap_state == pci_mmap_mem &&
752 (rp->flags & IORESOURCE_MEM) == 0))
753 continue;
754 }
755
Max Dmitrichenko57699072008-11-02 00:34:10 -0700756 /* Align the resource end to the next page address.
757 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
758 * because actually we need the address of the next byte
759 * after rp->end.
760 */
761 aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
762
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700763 if ((rp->start <= user_paddr) &&
Max Dmitrichenko57699072008-11-02 00:34:10 -0700764 (user_paddr + user_size) <= aligned_end)
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700765 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
767
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700768 if (i > PCI_ROM_RESOURCE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return -EINVAL;
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 return 0;
772}
773
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
775 * device mapping.
776 */
777static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
778 enum pci_mmap_state mmap_state)
779{
David S. Millera7a6cac2005-09-01 21:51:26 -0700780 /* Our io_remap_pfn_range takes care of this, do nothing. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781}
782
783/* Perform the actual remap of the pages for a PCI device mapping, as appropriate
784 * for this architecture. The region in the process to map is described by vm_start
785 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
786 * The pci device structure is provided so that architectures may make mapping
787 * decisions on a per-device or per-bus basis.
788 *
789 * Returns a negative error code on failure, zero on success.
790 */
791int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
792 enum pci_mmap_state mmap_state,
793 int write_combine)
794{
795 int ret;
796
797 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
798 if (ret < 0)
799 return ret;
800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 __pci_mmap_set_pgprot(dev, vma, mmap_state);
802
David S. Miller14778d92006-03-21 02:29:39 -0800803 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 ret = io_remap_pfn_range(vma, vma->vm_start,
805 vma->vm_pgoff,
806 vma->vm_end - vma->vm_start,
807 vma->vm_page_prot);
808 if (ret)
809 return ret;
810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 return 0;
812}
813
David S. Millerc1b1a5f2008-03-19 04:52:48 -0700814#ifdef CONFIG_NUMA
815int pcibus_to_node(struct pci_bus *pbus)
816{
817 struct pci_pbm_info *pbm = pbus->sysdata;
818
819 return pbm->numa_node;
820}
821EXPORT_SYMBOL(pcibus_to_node);
822#endif
823
David S. Millerd3ae4b52008-09-09 23:54:02 -0700824/* Return the domain number for this pci bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826int pci_domain_nr(struct pci_bus *pbus)
827{
828 struct pci_pbm_info *pbm = pbus->sysdata;
829 int ret;
830
David S. Millerd3ae4b52008-09-09 23:54:02 -0700831 if (!pbm) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 ret = -ENXIO;
833 } else {
David S. Miller6c108f12007-05-07 23:49:01 -0700834 ret = pbm->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836
837 return ret;
838}
839EXPORT_SYMBOL(pci_domain_nr);
840
David S. Miller35a17eb2007-02-10 17:41:02 -0800841#ifdef CONFIG_PCI_MSI
842int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
843{
David S. Millera2fb23a2007-02-28 23:35:04 -0800844 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000845 unsigned int irq;
David S. Miller35a17eb2007-02-10 17:41:02 -0800846
David S. Millere9870c42007-05-07 23:28:50 -0700847 if (!pbm->setup_msi_irq)
David S. Miller35a17eb2007-02-10 17:41:02 -0800848 return -EINVAL;
849
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000850 return pbm->setup_msi_irq(&irq, pdev, desc);
David S. Miller35a17eb2007-02-10 17:41:02 -0800851}
852
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000853void arch_teardown_msi_irq(unsigned int irq)
David S. Miller35a17eb2007-02-10 17:41:02 -0800854{
Thomas Gleixner394d4412011-03-24 17:52:54 +0100855 struct msi_desc *entry = irq_get_msi_desc(irq);
David S. Miller35a17eb2007-02-10 17:41:02 -0800856 struct pci_dev *pdev = entry->dev;
David S. Millera2fb23a2007-02-28 23:35:04 -0800857 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
David S. Miller35a17eb2007-02-10 17:41:02 -0800858
David S. Miller77d10d02008-09-11 23:57:40 -0700859 if (pbm->teardown_msi_irq)
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000860 pbm->teardown_msi_irq(irq, pdev);
David S. Miller35a17eb2007-02-10 17:41:02 -0800861}
862#endif /* !(CONFIG_PCI_MSI) */
863
David S. Millerad7ad572007-07-27 22:39:14 -0700864static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
865{
866 struct pci_dev *ali_isa_bridge;
867 u8 val;
868
869 /* ALI sound chips generate 31-bits of DMA, a special register
870 * determines what bit 31 is emitted as.
871 */
872 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
873 PCI_DEVICE_ID_AL_M1533,
874 NULL);
875
876 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
877 if (set_bit)
878 val |= 0x01;
879 else
880 val &= ~0x01;
881 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
882 pci_dev_put(ali_isa_bridge);
883}
884
FUJITA Tomonoriee664a92009-08-10 11:53:16 +0900885int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask)
David S. Millerad7ad572007-07-27 22:39:14 -0700886{
887 u64 dma_addr_mask;
888
889 if (pdev == NULL) {
890 dma_addr_mask = 0xffffffff;
891 } else {
892 struct iommu *iommu = pdev->dev.archdata.iommu;
893
894 dma_addr_mask = iommu->dma_addr_mask;
895
896 if (pdev->vendor == PCI_VENDOR_ID_AL &&
897 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
898 device_mask == 0x7fffffff) {
899 ali_sound_dma_hack(pdev,
900 (dma_addr_mask & 0x80000000) != 0);
901 return 1;
902 }
903 }
904
905 if (device_mask >= (1UL << 32UL))
906 return 0;
907
908 return (device_mask & dma_addr_mask) == dma_addr_mask;
909}
910
David S. Millerbcea1db2007-12-25 02:20:33 -0800911void pci_resource_to_user(const struct pci_dev *pdev, int bar,
912 const struct resource *rp, resource_size_t *start,
913 resource_size_t *end)
914{
915 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
916 unsigned long offset;
917
918 if (rp->flags & IORESOURCE_IO)
919 offset = pbm->io_space.start;
920 else
921 offset = pbm->mem_space.start;
922
923 *start = rp->start - offset;
924 *end = rp->end - offset;
925}
Tejun Heo4c0eec72009-09-22 17:34:17 +0900926
Myron Stoweba232a12011-10-28 15:48:10 -0600927void pcibios_set_master(struct pci_dev *dev)
928{
929 /* No special bus mastering setup handling */
930}
931
Tejun Heo4c0eec72009-09-22 17:34:17 +0900932static int __init pcibios_init(void)
933{
934 pci_dfl_cache_line_size = 64 >> 2;
935 return 0;
936}
937subsys_initcall(pcibios_init);
David S. Miller2ef2d742010-02-20 19:53:55 -0800938
939#ifdef CONFIG_SYSFS
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100940static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
David S. Miller2ef2d742010-02-20 19:53:55 -0800941{
942 const struct pci_slot_names {
943 u32 slot_mask;
944 char names[0];
945 } *prop;
946 const char *sp;
947 int len, i;
948 u32 mask;
949
950 prop = of_get_property(node, "slot-names", &len);
951 if (!prop)
952 return;
953
954 mask = prop->slot_mask;
955 sp = prop->names;
956
957 if (ofpci_verbose)
958 printk("PCI: Making slots for [%s] mask[0x%02x]\n",
959 node->full_name, mask);
960
961 i = 0;
962 while (mask) {
963 struct pci_slot *pci_slot;
964 u32 this_bit = 1 << i;
965
966 if (!(mask & this_bit)) {
967 i++;
968 continue;
969 }
970
971 if (ofpci_verbose)
972 printk("PCI: Making slot [%s]\n", sp);
973
974 pci_slot = pci_create_slot(bus, i, sp, NULL);
975 if (IS_ERR(pci_slot))
976 printk(KERN_ERR "PCI: pci_create_slot returned %ld\n",
977 PTR_ERR(pci_slot));
978
979 sp += strlen(sp) + 1;
980 mask &= ~this_bit;
981 i++;
982 }
983}
984
985static int __init of_pci_slot_init(void)
986{
987 struct pci_bus *pbus = NULL;
988
989 while ((pbus = pci_find_next_bus(pbus)) != NULL) {
990 struct device_node *node;
991
992 if (pbus->self) {
David S. Miller2ef2d742010-02-20 19:53:55 -0800993 /* PCI->PCI bridge */
Grant Likely61c7a082010-04-13 16:12:29 -0700994 node = pbus->self->dev.of_node;
David S. Miller2ef2d742010-02-20 19:53:55 -0800995 } else {
996 struct pci_pbm_info *pbm = pbus->sysdata;
997
998 /* Host PCI controller */
Grant Likely61c7a082010-04-13 16:12:29 -0700999 node = pbm->op->dev.of_node;
David S. Miller2ef2d742010-02-20 19:53:55 -08001000 }
1001
1002 pci_bus_slot_names(node, pbus);
1003 }
1004
1005 return 0;
1006}
Paul Gortmaker1b925b52014-01-12 13:07:30 -05001007device_initcall(of_pci_slot_init);
David S. Miller2ef2d742010-02-20 19:53:55 -08001008#endif